Table 2.

Average CI values (from triplicate analyses) of the DCM extractable fractions upon thermal ageing at 60 °C of V-PP, E-PP, and their respective mixtures with QS and NS sands

Sample	Bed	t(Δ)(a) (days)	DCM extract(b) (wt%)	CI
V-PP	-	0	1.0	≈0
E-PP	-	0	7.1 ± 1.3	2.88
V-PP	NS	35	1.2 ± 0.3	0.34
V-PP	QS	35	1.2 ± 0.1	0.20
E-PP	NS	35	3.0 ± 1.8	2.33
E-PP	QS	35	3.3 ± 2.4	2.91

^(a)Days of thermal ageing at 60 °C

^(b)Weight % of the initial PP content